Read that as hasn't slept with his wife. Thought that was gonna be evidence of being unhinged.
Which different characteristics? Pain tolerance?
He I think is the only one shown to have a sad childhood photo, which plays into the MPD/DID too. Maybe something extra f-ed up happened and he got multied.
When is he called "they"? Luffy says it's they at Jaya, but I always thought he just meant Blackbeard's crew was in waiting. If he meant Teach is multiple people in some way, it's weird he's never brought it up again and that nobody else brought it up, like Ace, WB, Marco, Admirals or Garp. You'd think someone else would be able to notice, if Luffy could tell before he even had much haki ability.